Stone-surfacing machine



Apr. 17, 1923. 1,452,1l3

F. J. GOULD STONE SURFAC ING MACHINE Original Filed Oct. 5, 1919 2Sheets-Sheet l FII . ZZ Z iff Apr. 17, 1923. ASZEB F. J. GOULD STONESURFAC I NG MACHINE Patented Apr. 17, 1923.

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FRED J'. GOULD, 0F SPRINGFIELD, MASSACHUSETTS.

STONE-SURFACING MACHINE.

Application filed October 3, 19f9, Serial No. 328,112. Renewed November28, 1922.

To all whom t may concern.' Be it known that I, FRED d. GoUnD, a citi-Azen of the United States, residn at 10 Sum-V ner Avenue, Springfield,assachusetts, have invented certain new and useful lmprovements inStone-Surfacing Machines, of which the following is a specification.

This invention relates to stone surfacing machines and has for itsgeneral object to increase the efficiency of machines of this class,particularly as regards control of the cut, to the end that more andbetter work may be performed. This object, and certain other features ofadvantage which will appear more fully hereinafter, .is secured inthemachine of the present invention.

According to my invention, I provide duplicate cutter heads having theiraxes of rotation parallel to each other, and eachl equipped with aplurality or radially disposed revoluble cutters adapted to be drivenindependently of said heads over the'surface.

of the stone to be polished as the stone is fed therebeneath, thecutters of one head coming in alternation with those of the oppositehead whereby the paths cut by the respective groups of cutters slighlyoverlap to prevent leaving an unfinished core at the center. The cutterheads are mounted upon a common supporting member which is adjustablevertically relative to the stone to vary the depth of cut and the stoneitself is mounted on a traveling table which feeds automatically beneaththe cutters.

vention, together with an embodiment which well illustrates theprinciples involved is described and shown in the following speci' Theconstruction and operation of my in- My novel cutter heads l and 2 aremounted for vertical adjustment upon the cross head 3 of a plurality ofspaced uprights l constituting an open framing within which the stone Sto be polished is supported upon a traveling table 5 located beneath thecutters. The table 5 is mounted on a suitable track` way 6 and isadapted to be fed longitudinally therealong by any suitable mechanism.

A s here shown, the table 5 is provided 60 with a rack 7 with whichmeshes a pinion 8 on a pinion shaft 9. Shaft 9 is driven from a clutchshaft 11 by means cfa pinion 10 thereon meshing with a gear 12 on shaft9. The clutch shaft 11 is provided with a re- 65 versing clutch 18whereby the direction of feed of the table 5 may be reversed as itapproaches the limit of its travel in either direction, and said shaftis adapted to be driven from a counter shaft 14 by either 70 the openbelt 13 or crossed belt 131 according to the direction of feed of thetable. The counter shaftrll is driven from a motor 15 by a pinion 16 onthe motor shaft which meshes with a gear 1,7` on the counter shaft.

The cross head 3 is adapted to be raised and lowered relative to thestone S by elev vating screws 19 which are arranged to be driven ineither direction at will to control the direction of movement of thehead. The screws 19 engage through suitable nuts 20 on the cross headand are rotated in either direction by the motor 15. As here shown,

the drive is from the counter shaft through either the open belt 21 orthe crossed belt 85 211 to a clutch shaft 22 which is provided with areversing clutch 221 for changing the direction of rotation. of thescrews. The clutch shaft 22 vhas bevel gears 24.- thereon which meshwith gears 23 on stub shafts 25, 90 and shafts 25 drive the screwsthrough meshing gears 26 and 27 on stub shafts and screws, respectively.

The cutter heads 1 and 2 are mounted on shafts and 34- and are adaptedto be simul- 05 taneously driven in opposite directions by a. motor 28mounted on a cross girt 29. As here shown, the motor shaft has a pinion30 thereon meshin with a gear 31 on a drive than 3a, The@ aft 32 drivesshafts 33eme "MQ through the bevel gears and 36 which mesh with gears37V and 38on shafts 33 and 34. These shafts 33 and 34 are mounted insuitable bearings on the cross head 3 and girt. 29 and pass freelythrough the bevel gears 37 and 38, which are splined thereto, as thecross head is raised and lowered by the elevating screws 19.

Each cutter head consists of a disc 1 or 2 upon which is mounted a`plurality of radially disposed independently revoluble cutter elements11 and 21 adapted to operate over the surface of the stone inalternation. one with the'other so'as nto-"polish `-tlie'entire surface.

To this end, the cutter shafts 33 and 34 are passed through hollowshaftsor sleeves 39 and 40, which 'are rotated independently of said shafts,and are 'provided at their lower ends with bevel gears 41 and 42 whichmesh with bevely pinions 43 on the innerV ends ofthe Varbore, 44 for thecutters 11 and 21, there beinga pinion 43`forl each cutter element'.

' The` sleeves 39 and 40 are rOtated from 'the drive Shaft 32 by avertical Shaft i5 journaled in bearings on the cross head 3 .and gir't29 and providedl with aspiral gear 46 meshing with a similar gearl 47 onshaft 32, vsaid gear' 46'being splined to the shaft to permit the shaftto slide upwardly therethrough when the cross head is` elevated. Atits., lower end, shafty 45' is provided with a spur gear 48 which mesheswith a'spur gear 49on sleeve 40 and through an interposed gear 50 on astub shaft 5 1 meshing with a spur gear 5:2 on sleeve 39 x drives saidsleeve 39 invreverse direction tsleeve 40.

By this construction, the shafts 33 and 34 carrying discs 1 and 2 varesimultaneously7 rotated direct from the drive shaft 32. and

preferably in opposite directions, and the y. individual cutters 11 and21 mounted on said 15,.discs are rotated independently of the rotationof said discs by sha-ft 45 and vsleeves V39y and 40. This gives tothecutters 11 and 21 of each disc a circling motion as agroup 1 the shafts33 and 34 asaxes and at "the sarnetime said cutters'have'independentrev- 4elution abouttheir individual arbors 44, as

indicated by the arrows, Fig. III. The arrangement is such that thecutters of one g disc travel in alternating sequence to those f oftheother` disc, producing a slight overlapping of the paths cut byv the two`groups of cutterswhereby'to prevent leaying an iinnished centrallcore'inl the surfacebeing polished. Preferably, the cutters of eachdisc group rotate in a diretion oppositel to the direction of rotationof the disc itself,

anilhee in @Brasiliens Qnpeste .to 6.21011 aber: v

.1i-Permian, with a bleek. of stese S. in

plaeeipbnthe travelingtable 'fth'ecress head 3 is lowered until theabrasive elements 1l and 21 are cutting a suitable depth into thesurface of the stone, which is automatically fed forward under saidelements by the described stone feeding mechanism.

While l have shown and described the groups of cutters 11 and 21 asdriven by the shaft 42 through the shaft 45, gears 48, 49, 59, 52,sleeves 39, and 40, bevel gears 41 and 42, and bevel pinions `4,3, saidcritters may obviously be driven by any other mechanism which"will causethem to rotate independently of the discs 1 and 2.

' Various modifications in the construction and operation of my devicemay obviously be resorted to if within the limits of the appendedclaims.

What I therefore claim and desire to secure by Letters Patent is:

1. In a stone surfacing machine, a frame; a common drive shaft,` a pairof shafts driven therefrom, rotary surfacing heads mounted Aon saidshafts, rotary 'surfacing implement-s mounted on said heads,`a pair ofhollow shafts sleeved-:about said firstnamed pair of shafts,gearingbetween said hollow shafts and the arbors of said rotarysurfacing implements for rotating said implements independently of therotationfof saidheads, a shaft disposed'betweeni'said pair of shafts anddriven :from said common drive shaft and'gearing between saidintermediate shaft and said hollow'shafts.

2. In a stone surfacing machine, a frame, a common drive shaft, a pairof shafts driven therefrom, rotary surfacing heads inpunted on saidshafts, rotary surfaeing implements mountedon said heads, a pair ofhollow shafts sleeved about said first-named pair of shafts,gearing'between said hollow shafts and the arbors of said rotarysurfacingl implements', ferrotating said implements independently of therotation of said heads', a shaft disposed between said pair of shaftsand driven from said common "drive shaft, a on said intermediate" shaft,a gear on one of said hollow vshafts meshing therewith,y av` stub shaft.a gear thereon meshing with said gear on the intermediate shaft, anda'gear on' the opposite hollow shaft meshing with k"the gear on saidstub shaft whereby said hollow shafts are retated in opposite directinste each other.

3. In a stone surfacing machine a common vdrive shaft. a pairof shaftsdriven therefrom, a rotary surfacing head mounted on each driven shaft.rotary surfacing yimple-ments mounted Von said heads` and means forrotating saidimpleinents independently of the rotatio'n'of said headsincluding a shaft disposed between said pair of driven shafts and drivenfrom said common drive shaft, and operativeconnections from saidintermediate shaft `to the arbo'r's of said implements. Y

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4. In a stone surfacing machine, a comlast named pair of shafts drivenfrom said mon drive shaft, a pair of shafts driven common drive shaft.therefrom, a rotary surfacing head mounted In testimony whereof I aiX mysignature on each driven shaft, rotary surfacing imin presence of twoWitnesses.

5 plements mounted on said heads, a pair of FRED J. GOUIJD.

shafts for driving the arbors of said impie- Witnesses: mentsindependently of the rotation of said JOHN I-I. PARKER,

surfacing heads, and a drive shaft for said ALBERT J. ErsTEIN.

